Abstract

Electron paramagnetic resonance was used to identify paramagnetic centers in the blood and liver of laboratory rats with S-45 sarcoma and mice with Ehrlich carcinoma. Paraneoplastic changes in prooxidant and antioxidant activity of the blood and liver tissue, mitochondrial respiration, and NO metabolism and inhibition of antioxidant processes contribute to impairment of cell membrane structures, erythrocyte hemolysis, and hypoxia. An important role of these processes in the pathogenesis of paraneoplastic anemia is confirmed by the positive effect of antioxidant and membrane-stabilizing therapy.

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